Milling-cutter



(No Model.) 2 SheetsS.heet 1 A. H. MORTON. MILLING CUTTER.

No. 604,776. Patented May 51,1898.

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. 04 u [B a c f |E [j WITNESSES. INVENTO UNITED STATES PATENT OFFICE.

ALBERT. H. MOR'IONJOF LOlVlCLll, MASHAGHUSWNS.

CU-TTER.

SPECIFICATION forming art of I ette'rs Patent No. 604,776, dated May.31, 1898.

' Application filed March 8,1897.

To all whom it may concern Be it known that I, ALBERT II. MORTON, acitizen of the United States, residing at Lowell, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvementsfin Milling-Gutters; and I do hereby declarefthefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to whichit apperta'ins tomake and .use the same.

'The present invention relates to millingcutters, and more particularlyto that type of cutters which comprise removable and renewable bladesorcutters fitted to a stock or body portion. i Y

The object of the present invention is to produce a milling cutter ofsimple construction' which can be easily and cheaply made and one inwhichtheblades or' cutters shall be firmlyand securely held in afixed-position upon the stockfor body portion and to'so construct. the,samethat should one of theblades break in .use another could be quicklyand readily substituted therefor. To the above end the present inventioncon-v sists of a milling-cutter constructed and arranged as hereinafterdescribed and claimed.

The invention .is illustrated in the accompanying drawings, in which-Figure 1 shows a face view of .one form' thereof; Fig.v 2, a plan view,partially-in sec tion; Fig. 3, an end view of a modified form of theinvention Fig. 4, a plan View, partially in section, of the same cuttershown in Fig. 3; Fig. 5, a plan view of another modification, and Figs.6 and 7 detail views representing the clamping blocks and bars. vSimilar-letters of reference refer to correspondir. g parts throughoutthe several views. In the form of the invention shown in'Fig.1,A'represents the stock or body portion, circular in form and providedwith the threaded opening a, whereby it may be secured upon Around the'stock A are-securely fastened a series .of cutters ofblades B, which areclamped in screws D. y

In order to securelyfasten the blades B in position upon the stock A,saidstock is prefposition by the blocks 0 and .erably provided with theradial. grooves or jectedbeyond one faceof the stock or .rece'sses onthe blades and cutters heretofore constructed. words, the width of theblocks Serial No. 626,368. -(No 'model-) blades B fit, and the blocks 0are made with beveled sides 0, or substantially wedge shape incross-section, whereby when the screws D are screwed up tightly thesides c of said blocks will closely engagethe sides of blades B and willcause-them to be clamped in a firm and secure manner between the faces 0of two adjacent blocks .0. I

If desired, the stock or bodyA may be provided with a flange,-which' isout out at intervals, as shown at e, corresponding to the seats a in thestock A, whereby projections c are formed, which projectup between the.-

blades B and form suitable back-stops to ac c'urately position theclamping-blocksBa The cutter above described is a face-cutter,

the cutting edges 1) of blades B being'pro-' body A, and as the bladeswear away they may be sharpened and 'moved forward to position theircutting edges, or if one blade becomes broken it may be ground down andpositioned without disturbing the other blades;

It will be noted that the clamping-blocks C form a broken ring orannulus, theinner diameter of which is greater than the outer diameterof the stock or body A, and that there-' fore. a space is left betweenthe bottom faces of the blocks 0 and the face of the stock or bodyA,-whereby the blocks 0 when drawn down between'the blades B will beenabled to exert a the sides of the blades B, obviating the necessity offorming interlocking projections and blocks, as in the .In. other Crelatively to the space between the "blades or cutters B is clampingcontact with the sides of said blades blocks comes in contact withthe'periphery of the stock or body A,'and thus the blades B. are held inposition by the clamping or wedging action ofsaid blocks 0.

The blocks Care preferably provided-with countersunk recesses c toreceive the heads of the screws D, so that when theparts are assembledthey Will not periphery of the cutter.

In the cutter-shown .in Figs. 3 and 5 the powerful clamping actionvagainst project beyond the r such that the inclined faces 0 will comeinto or' cutters-B before theinner' face of said too 2 I eoarre bladesor cutters B are arranged as peripheral cutters instead of face cutters.In this form of cutter the stock or body A is made in the form of acylinder, preferably having along its face grooves or seats a to receivethe lower edges .of the blades B, as in the devicehereinbeforedes'cribed. represents wedgebars similar to thewedge-blocksO, before described, which are fitted between the blades Band drawn downward toward the stock or body A by screws D, whereby theblades B are securely clamped in position. If desired, the stock or bodyA may be provided at its transverse center with the projections e whichare similar to the projections e of the cutters shown in Fig. 1, inwhich case the wedge-bars 0 would be made in two sections, the innerends of which would abut against the said projection 6 The cutter shownin Fig. is the same as that shown in Fig. 4, with the exception that theprojections e on the stock or body are omitted and the wedge.- bars madeof such a length as to extend along the entire length of the stock orbody.

It will be noted that the wedge-blocks and wedge-bars do not come incontact with the face of the stock or body and that therefore a powerfulWedging action is imparted thereto by the screws D and D, tending toforcibly and firmly grip the blades B and B between them, therebyobviating the necessity of providing said blades and blocks withinterlocking lugs and recesses.

While I have described the stock or body as being provided with groovesor seats to receive the backs or lower edges of the blades,

and thereby more effectually secure said blades in position, it isobvious that said grooves are not essentiaL-as the lower edgesof thebladescould just as well rest upon the surface of the stock or bodyportion, and the clamping or wedging action of the wedge blocks or barsalone holds them fixedly in position.

\Vhile I have illustrated the blades as ra dially disposed along theperiphery of the stock or body portion, I-do'not regard such specificdisposition as an essential feature of the present invention, since itis evident that with slight modifications in the form and arrangement ofthe parts hereinbefore described the blades may be disposed tangentiallyor in, any required manner to secure the greatest eiiiciency.

Having fully described my invention, I claim as new and desire to secureby Letters Patent of the United Statesi 1. In a milling=cutter, thecombination with a central stock or body portion comprising an integralblock having threaded holes around.- the periphery and a centralaperture, of aseries of cutters disposed around the periphery of saidstock' or body portion, a series of removable wedge-shaped bars orblocks alternating with the cutters and screws passing through said barsor blocks and engaging the 'threaded holes in the stock or body portion,

the inner peripheral faces of said bars 'or' blocks being of greaterwidth than the periph-'.

eral face of the stock or body portion exposed between the. cutters,whereby the bars or blocks may be caused to forcibly engage the sides ofthe cutters and securely hold them in position upon the stock or bodyportion, substantially as described. v

2. In a milling-cutter, the combination with the stock or body portion,of a series of blades disposed along the periphery thereof, a seriesof-fixed projections on the stock or body portion extending between theblades, and a series of clamping-blocks interposed between the blades,and arranged to be brought into clamping contact therewith,substantiallyas described.

- In testimony whereof I affix my signature 85.

in presence ofxtwo witnesses.

ALBERT H. MORTON.

'Witnesses:

J OHN K. WHI TIER, HENRY W. CHURCH.

